Identification of priority pollutants and key factors affecting environmental risks of lead‑zinc mine tailing sites.

Autor: Peng JY; MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China., Zhang S; MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China. Electronic address: zhangshuaiqj@zju.edu.cn., Wang YJ; China Solid Waste and Chemicals Management (SCC), Ministry of Ecology and Environment of the People's Republic of China (MEE), Beijing 100029, China., Zhao RF; China Solid Waste and Chemicals Management (SCC), Ministry of Ecology and Environment of the People's Republic of China (MEE), Beijing 100029, China., Zhou YL; MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China., Zhou JW; Chengdu Surveying Geotechnical Research Institute Co., Ltd. Of MCC, Chengdu 610023, China.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Sep 01; Vol. 889, pp. 164039. Date of Electronic Publication: 2023 May 19.
DOI: 10.1016/j.scitotenv.2023.164039
Abstrakt: Lead‑zinc mine tailing sites are widely distributed in China. Tailing sites with different hydrological settings tend to have different susceptibilities toward pollution and hence different priority pollutants and environmental risks. This paper aims to identify priority pollutants and key factors influencing environmental risks of lead‑zinc mine tailing sites with different types of hydrological settings. A database with detailed information on hydrological settings, pollution, etc. of 24 typical lead‑zinc mine tailing sites in China was built. A rapid classification method of hydrological settings was proposed considering the groundwater recharge and migration of pollutants in the aquifer. Priority pollutants in leach liquor of tailings, soil, and groundwater of sites were identified using the osculating value method. The key factors affecting environmental risks of lead‑zinc mine tailing sites were identified using the random forest algorithm. Four types of hydrological settings were classified. Pb/Zn/As/Cd/Sb, Fe/Pb/As/Co/Cd, and nitrate/iodide/As/Pb/Cd are identified as priority pollutants of leach liquor, soil, and groundwater, respectively. The lithology of the surface soil media, slope, and groundwater depth were identified as the top 3 key factors that affect the environmental risks of sites. Priority pollutants and key factors identified in this study can provide benchmarks for the risk management of lead‑zinc mine tailing sites.
Competing Interests: Declaration of competing interest We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.
(Copyright © 2023. Published by Elsevier B.V.)
Databáze: MEDLINE
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